<?php
/**
 * FeedCreator class v1.7.2
 * originally (c) Kai Blankenhorn
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * GENERAL USAGE *********************************************************
 *
 * include("feedcreator.class.php");
 *
 * $rss = new UniversalFeedCreator();
 * $rss->useCached(); // use cached version if age<1 hour
 * $rss->title = "PHP news";
 * $rss->description = "daily news from the PHP scripting world";
 *
 * //optional
 * $rss->descriptionTruncSize = 500;
 * $rss->descriptionHtmlSyndicated = true;
 *
 * $rss->link = "http://www.dailyphp.net/news";
 * $rss->syndicationURL = "http://www.dailyphp.net/".$_SERVER["PHP_SELF"];
 *
 * $image = new FeedImage();
 * $image->title = "dailyphp.net logo";
 * $image->url = "http://www.dailyphp.net/images/logo.gif";
 * $image->link = "http://www.dailyphp.net";
 * $image->description = "Feed provided by dailyphp.net. Click to visit.";
 *
 * //optional
 * $image->descriptionTruncSize = 500;
 * $image->descriptionHtmlSyndicated = true;
 *
 * $rss->image = $image;
 *
 * // get your news items from somewhere, e.g. your database:
 * mysql_select_db($dbHost, $dbUser, $dbPass);
 * $res = mysql_query("SELECT * FROM news ORDER BY newsdate DESC");
 * while ($data = mysql_fetch_object($res)) {
 * $item = new FeedItem();
 * $item->title = $data->title;
 * $item->link = $data->url;
 * $item->description = $data->short;
 *
 * //optional
 * item->descriptionTruncSize = 500;
 * item->descriptionHtmlSyndicated = true;
 *
 * $item->date = $data->newsdate;
 * $item->source = "http://www.dailyphp.net";
 * $item->author = "John Doe";
 *
 * $rss->addItem($item);
 * }
 *
 * // valid format strings are: RSS0.91, RSS1.0, RSS2.0, PIE0.1 (deprecated),
 * // MBOX, OPML, ATOM, ATOM0.3, HTML, JS
 * echo $rss->saveFeed("RSS1.0", "news/feed.xml");
 *
 * // your local timezone, set to "" to disable or for GMT
 *
 * /*
 * Version string.
 */
define("FEEDCREATOR_VERSION", "Collabtive");
define("TIME_ZONE", "+01:00");

/*
 * A FeedItem is a part of a FeedCreator feed.
 *
 * @author Kai Blankenhorn <kaib@bitfolge.de>
 * @since 1.3
 */
class FeedItem extends HtmlDescribable {
    /*
	 * Mandatory attributes of an item.
	 */
    var $title, $description, $link;

    /*
	 * Optional attributes of an item.
	 */
    var $author, $authorEmail, $image, $category, $comments, $guid, $source, $creator;

    /*
	 * Publishing date of an item. May be in one of the following formats:
	 *
	 *	RFC 822:
	 *	"Mon, 20 Jan 03 18:05:41 +0400"
	 *	"20 Jan 03 18:05:41 +0000"
	 *
	 *	ISO 8601:
	 *	"2003-01-20T18:05:41+04:00"
	 *
	 *	Unix:
	 *	1043082341
	 */
    var $date;

    /*
	 * Any additional elements to include as an assiciated array. All $key => $value pairs
	 * will be included unencoded in the feed item in the form
	 *     <$key>$value</$key>
	 * Again: No encoding will be used! This means you can invalidate or enhance the feed
	 * if $value contains markup. This may be abused to embed tags not implemented by
	 * the FeedCreator class used.
	 */
    var $additionalElements = Array();
    // on hold
    // var $source;
}

/*
 * An FeedImage may be added to a FeedCreator feed.
 * @author Kai Blankenhorn <kaib@bitfolge.de>
 * @since 1.3
 */
class FeedImage extends HtmlDescribable {
    /*
	 * Mandatory attributes of an image.
	 */
    var $title, $url, $link;

    /*
	 * Optional attributes of an image.
	 */
    var $width, $height, $description;
}

/*
 * An HtmlDescribable is an item within a feed that can have a description that may
 * include HTML markup.
 */
class HtmlDescribable {
    /*
	 * Indicates whether the description field should be rendered in HTML.
	 */
    var $descriptionHtmlSyndicated;

    /*
	 * Indicates whether and to how many characters a description should be truncated.
	 */
    var $descriptionTruncSize;

    /*
	 * Returns a formatted description field, depending on descriptionHtmlSyndicated and
	 * $descriptionTruncSize properties
	 * @return    string    the formatted description
	 */
    function getDescription()
    {
        $descriptionField = new FeedHtmlField($this->description);
        $descriptionField->syndicateHtml = $this->descriptionHtmlSyndicated;
        $descriptionField->truncSize = $this->descriptionTruncSize;
        return $descriptionField->output();
    }
}

/*
 * An FeedHtmlField describes and generates
 * a feed, item or image html field (probably a description). Output is
 * generated based on $truncSize, $syndicateHtml properties.
 * @author Pascal Van Hecke <feedcreator.class.php@vanhecke.info>
 * @version 1.6
 */
class FeedHtmlField {
    /*
	 * Mandatory attributes of a FeedHtmlField.
	 */
    var $rawFieldContent;

    /*
	 * Optional attributes of a FeedHtmlField.
	 *
	 */
    var $truncSize, $syndicateHtml;

    /*
	 * Creates a new instance of FeedHtmlField.
	 * @param  $string: if given, sets the rawFieldContent property
	 */
    function FeedHtmlField($parFieldContent)
    {
        if ($parFieldContent) {
            $this->rawFieldContent = $parFieldContent;
        }
    }

    /*
	 * Creates the right output, depending on $truncSize, $syndicateHtml properties.
	 * @return string    the formatted field
	 */
    function output()
    {
        // when field available and syndicated in html we assume
        // - valid html in $rawFieldContent and we enclose in CDATA tags
        // - no truncation (truncating risks producing invalid html)
        if (!$this->rawFieldContent) {
            $result = "";
        } elseif ($this->syndicateHtml) {
            $result = "<![CDATA[" . $this->rawFieldContent . "]]>";
        } else {
            if ($this->truncSize and is_int($this->truncSize)) {
                $result = FeedCreator::iTrunc(htmlspecialchars($this->rawFieldContent), $this->truncSize);
            } else {
                $result = htmlspecialchars($this->rawFieldContent);
            }
        }
        return $result;
    }
}

/*
 * UniversalFeedCreator lets you choose during runtime which
 * format to build.
 * For general usage of a feed class, see the FeedCreator class
 * below or the example above.
 *
 * @since 1.3
 * @author Kai Blankenhorn <kaib@bitfolge.de>
 */
class UniversalFeedCreator extends FeedCreator {
    var $_feed;

    function _setFormat($format)
    {
        switch (strtoupper($format)) {
            case "2.0":
            // fall through
            case "RSS2.0":
                $this->_feed = new RSSCreator20();
                break;

            case "1.0":
            // fall through
            case "RSS1.0":
                $this->_feed = new RSSCreator10();
                break;

            case "0.91":
            // fall through
            case "RSS0.91":
                $this->_feed = new RSSCreator091();
                break;

            case "PIE0.1":
                $this->_feed = new PIECreator01();
                break;

            case "MBOX":
                $this->_feed = new MBOXCreator();
                break;

            case "OPML":
                $this->_feed = new OPMLCreator();
                break;

            case "ATOM":
            // fall through: always the latest ATOM version
            case "ATOM0.3":
                $this->_feed = new AtomCreator03();
                break;

            case "HTML":
                $this->_feed = new HTMLCreator();
                break;

            case "JS":
            // fall through
            case "JAVASCRIPT":
                $this->_feed = new JSCreator();
                break;

            default:
                $this->_feed = new RSSCreator091();
                break;
        }

        $vars = get_object_vars($this);
        foreach ($vars as $key => $value) {
            // prevent overwriting of properties "contentType", "encoding"; do not copy "_feed" itself
            if (!in_array($key, array("_feed", "contentType", "encoding"))) {
                $this->_feed-> {
                    $key} = $this-> {
                    $key} ;
            }
        }
    }

    /*
	 * Creates a syndication feed based on the items previously added.
	 *
	 * @see        FeedCreator::addItem()
	 * @param    string    format    format the feed should comply to. Valid values are:
	 *			"PIE0.1", "mbox", "RSS0.91", "RSS1.0", "RSS2.0", "OPML", "ATOM0.3", "HTML", "JS"
	 * @return    string    the contents of the feed.
	 */
    function createFeed($format = "RSS0.91")
    {
        $this->_setFormat($format);
        return $this->_feed->createFeed();
    }

    /*
	 * Saves this feed as a file on the local disk. After the file is saved, an HTTP redirect
	 * header may be sent to redirect the use to the newly created file.
	 * @since 1.4
	 *
	 * @param	string	format	format the feed should comply to. Valid values are:
	 *			"PIE0.1" (deprecated), "mbox", "RSS0.91", "RSS1.0", "RSS2.0", "OPML", "ATOM", "ATOM0.3", "HTML", "JS"
	 * @param	string	filename	optional	the filename where a recent version of the feed is saved. If not specified, the filename is $_SERVER["PHP_SELF"] with the extension changed to .xml (see _generateFilename()).
	 * @param	boolean	displayContents	optional	send the content of the file or not. If true, the file will be sent in the body of the response.
	 */
    function saveFeed($format = "RSS0.91", $filename = "", $displayContents = true)
    {
        $this->_setFormat($format);
        $this->_feed->saveFeed($filename, $displayContents);
    }

    /*
    * Turns on caching and checks if there is a recent version of this feed in the cache.
    * If there is, an HTTP redirect header is sent.
    * To effectively use caching, you should create the FeedCreator object and call this method
    * before anything else, especially before you do the time consuming task to build the feed
    * (web fetching, for example).
    *
    * @param   string   format   format the feed should comply to. Valid values are:
    *       "PIE0.1" (deprecated), "mbox", "RSS0.91", "RSS1.0", "RSS2.0", "OPML", "ATOM0.3".
    * @param filename   string   optional the filename where a recent version of the feed is saved. If not specified, the filename is $_SERVER["PHP_SELF"] with the extension changed to .xml (see _generateFilename()).
    * @param timeout int      optional the timeout in seconds before a cached version is refreshed (defaults to 3600 = 1 hour)
    */
    function useCached($format = "RSS0.91", $filename = "", $timeout = 3600)
    {
        $this->_setFormat($format);
        $this->_feed->useCached($filename, $timeout);
    }
}

/*
 * FeedCreator is the abstract base implementation for concrete
 * implementations that implement a specific format of syndication.
 *
 * @abstract
 * @author Kai Blankenhorn <kaib@bitfolge.de>
 * @since 1.4
 */
class FeedCreator extends HtmlDescribable {
    /*
	 * Mandatory attributes of a feed.
	 */
    var $title, $description, $link;

    /*
	 * Optional attributes of a feed.
	 */
    var $syndicationURL, $image, $language, $copyright, $pubDate, $lastBuildDate, $editor, $editorEmail, $webmaster, $category, $docs, $ttl, $rating, $skipHours, $skipDays;

    /*
	* The url of the external xsl stylesheet used to format the naked rss feed.
	* Ignored in the output when empty.
	*/
    var $xslStyleSheet = "";

    /*
	 * @access private
	 */
    var $items = Array();

    /*
	 * This feed's MIME content type.
	 * @since 1.4
	 * @access private
	 */
    var $contentType = "application/xml";

    /*
	 * This feed's character encoding.
	 * @since 1.6.1
	 **/
    // var $encoding = "ISO-8859-1";
    var $encoding = "UTF-8";

    /*
	 * Any additional elements to include as an assiciated array. All $key => $value pairs
	 * will be included unencoded in the feed in the form
	 *     <$key>$value</$key>
	 * Again: No encoding will be used! This means you can invalidate or enhance the feed
	 * if $value contains markup. This may be abused to embed tags not implemented by
	 * the FeedCreator class used.
	 */
    var $additionalElements = Array();

    /*
	 * Adds an FeedItem to the feed.
	 *
	 * @param object FeedItem $item The FeedItem to add to the feed.
	 * @access public
	 */
    function addItem($item)
    {
        $this->items[] = $item;
    }

    /*
	 * Truncates a string to a certain length at the most sensible point.
	 * First, if there's a '.' character near the end of the string, the string is truncated after this character.
	 * If there is no '.', the string is truncated after the last ' ' character.
	 * If the string is truncated, " ..." is appended.
	 * If the string is already shorter than $length, it is returned unchanged.
	 *
	 * @static
	 * @param string    string A string to be truncated.
	 * @param int        length the maximum length the string should be truncated to
	 * @return string    the truncated string
	 */
    function iTrunc($string, $length)
    {
        if (strlen($string) <= $length) {
            return $string;
        }

        $pos = strrpos($string, ".");
        if ($pos >= $length-4) {
            $string = substr($string, 0, $length-4);
            $pos = strrpos($string, ".");
        }
        if ($pos >= $length * 0.4) {
            return substr($string, 0, $pos + 1) . " ...";
        }

        $pos = strrpos($string, " ");
        if ($pos >= $length-4) {
            $string = substr($string, 0, $length-4);
            $pos = strrpos($string, " ");
        }
        if ($pos >= $length * 0.4) {
            return substr($string, 0, $pos) . " ...";
        }

        return substr($string, 0, $length-4) . " ...";
    }

    /*
	 * Creates a comment indicating the generator of this feed.
	 * The format of this comment seems to be recognized by
	 * Syndic8.com.
	 */
    function _createGeneratorComment()
    {
        return "<!-- generator=\"Collabtive\" -->\n";
    }

    /*
	 * Creates a string containing all additional elements specified in
	 * $additionalElements.
	 * @param	elements	array	an associative array containing key => value pairs
	 * @param indentString	string	a string that will be inserted before every generated line
	 * @return    string    the XML tags corresponding to $additionalElements
	 */
    function _createAdditionalElements($elements, $indentString = "")
    {
        $ae = "";
        if (is_array($elements)) {
            foreach($elements AS $key => $value) {
                $ae .= $indentString . "<$key>$value</$key>\n";
            }
        }
        return $ae;
    }

    function _createStylesheetReferences()
    {
        $xml = "";
        if (isset($this->cssStyleSheet)) $xml .= "<?xml-stylesheet href=\"" . $this->cssStyleSheet . "\" type=\"text/css\"?>\n";
        if (isset($this->xslStyleSheet)) $xml .= "<?xml-stylesheet href=\"" . $this->xslStyleSheet . "\" type=\"text/xsl\"?>\n";
        return $xml;
    }

    /*
	 * Builds the feed's text.
	 * @abstract
	 * @return    string    the feed's complete text
	 */
    function createFeed()
    {
    }

    /*
	 * Generate a filename for the feed cache file. The result will be $_SERVER["PHP_SELF"] with the extension changed to .xml.
	 * For example:
	 *
	 * echo $_SERVER["PHP_SELF"]."\n";
	 * echo FeedCreator::_generateFilename();
	 *
	 * would produce:
	 *
	 * /rss/latestnews.php
	 * latestnews.xml
	 *
	 * @return string the feed cache filename
	 * @since 1.4
	 * @access private
	 */
    function _generateFilename()
    {
        $fileInfo = pathinfo($_SERVER["PHP_SELF"]);
        return substr($fileInfo["basename"], 0, - (strlen($fileInfo["extension"]) + 1)) . ".xml";
    }

    /*
	 * @since 1.4
	 * @access private
	 */
    function _redirect($filename)
    {
        // attention, heavily-commented-out-area
        // maybe use this in addition to file time checking
        // Header("Expires: ".date("r",time()+$this->_timeout));
        /* no caching at all, doesn't seem to work as good:
		Header("Cache-Control: no-cache");
		Header("Pragma: no-cache");
		*/
        // HTTP redirect, some feed readers' simple HTTP implementations don't follow it
        // Header("Location: ".$filename);
        Header("Content-Type: " . $this->contentType . "; charset=" . $this->encoding . "; filename=" . basename($filename));
        Header("Content-Disposition: inline; filename=" . basename($filename));
        readfile($filename, "r");
        die();
    }

    /*
	 * Turns on caching and checks if there is a recent version of this feed in the cache.
	 * If there is, an HTTP redirect header is sent.
	 * To effectively use caching, you should create the FeedCreator object and call this method
	 * before anything else, especially before you do the time consuming task to build the feed
	 * (web fetching, for example).
	 * @since 1.4
	 * @param filename	string	optional	the filename where a recent version of the feed is saved. If not specified, the filename is $_SERVER["PHP_SELF"] with the extension changed to .xml (see _generateFilename()).
	 * @param timeout	int		optional	the timeout in seconds before a cached version is refreshed (defaults to 3600 = 1 hour)
	 */
    function useCached($filename = "", $timeout = 3600)
    {
        $this->_timeout = $timeout;
        if ($filename == "") {
            $filename = $this->_generateFilename();
        }
        if (file_exists($filename) AND (time() - filemtime($filename) < $timeout)) {
            $this->_redirect($filename);
        }
    }

    /*
	 * Saves this feed as a file on the local disk. After the file is saved, a redirect
	 * header may be sent to redirect the user to the newly created file.
	 * @since 1.4
	 *
	 * @param filename	string	optional	the filename where a recent version of the feed is saved. If not specified, the filename is $_SERVER["PHP_SELF"] with the extension changed to .xml (see _generateFilename()).
	 * @param redirect	boolean	optional	send an HTTP redirect header or not. If true, the user will be automatically redirected to the created file.
	 */
    function saveFeed($filename = "", $displayContents = true)
    {
        if ($filename == "") {
            $filename = $this->_generateFilename();
        }
        $feedFile = fopen($filename, "w+");
        if ($feedFile) {
            fputs($feedFile, $this->createFeed());
            fclose($feedFile);
            if ($displayContents) {
                $this->_redirect($filename);
            }
        } else {
            echo "<br /><b>Error creating feed file, please check write permissions.</b><br />";
        }
    }
}

/*
 * FeedDate is an internal class that stores a date for a feed or feed item.
 * Usually, you won't need to use this.
 */
class FeedDate {
    var $unix;

    /*
	 * Creates a new instance of FeedDate representing a given date.
	 * Accepts RFC 822, ISO 8601 date formats as well as unix time stamps.
	 * @param mixed $dateString optional the date this FeedDate will represent. If not specified, the current date and time is used.
	 */
    function FeedDate($dateString = "")
    {
        if ($dateString == "") $dateString = date("r");

        if (is_integer($dateString)) {
            $this->unix = $dateString;
            return;
        }
        if (preg_match("~(?:(?:Mon|Tue|Wed|Thu|Fri|Sat|Sun),\\s+)?(\\d{1,2})\\s+([a-zA-Z]{3})\\s+(\\d{4})\\s+(\\d{2}):(\\d{2}):(\\d{2})\\s+(.*)~", $dateString, $matches)) {
            $months = Array("Jan" => 1, "Feb" => 2, "Mar" => 3, "Apr" => 4, "May" => 5, "Jun" => 6, "Jul" => 7, "Aug" => 8, "Sep" => 9, "Oct" => 10, "Nov" => 11, "Dec" => 12);
            $this->unix = mktime($matches[4], $matches[5], $matches[6], $months[$matches[2]], $matches[1], $matches[3]);
            if (substr($matches[7], 0, 1) == '+' OR substr($matches[7], 0, 1) == '-') {
                $tzOffset = (substr($matches[7], 0, 3) * 60 + substr($matches[7], -2)) * 60;
            } else {
                if (strlen($matches[7]) == 1) {
                    $oneHour = 3600;
                    $ord = ord($matches[7]);
                    if ($ord < ord("M")) {
                        $tzOffset = (ord("A") - $ord - 1) * $oneHour;
                    } elseif ($ord >= ord("M") AND $matches[7] != "Z") {
                        $tzOffset = ($ord - ord("M")) * $oneHour;
                    } elseif ($matches[7] == "Z") {
                        $tzOffset = 0;
                    }
                }
                switch ($matches[7]) {
                    case "UT":
                    case "GMT": $tzOffset = 0;
                }
            }
            $this->unix += $tzOffset;
            return;
        }
        if (preg_match("~(\\d{4})-(\\d{2})-(\\d{2})T(\\d{2}):(\\d{2}):(\\d{2})(.*)~", $dateString, $matches)) {
            $this->unix = mktime($matches[4], $matches[5], $matches[6], $matches[2], $matches[3], $matches[1]);
            if (substr($matches[7], 0, 1) == '+' OR substr($matches[7], 0, 1) == '-') {
                $tzOffset = (substr($matches[7], 0, 3) * 60 + substr($matches[7], -2)) * 60;
            } else {
                if ($matches[7] == "Z") {
                    $tzOffset = 0;
                }
            }
            $this->unix += $tzOffset;
            return;
        }
        $this->unix = 0;
    }

    /*
	 * Gets the date stored in this FeedDate as an RFC 822 date.
	 *
	 * @return a date in RFC 822 format
	 */
    function rfc822()
    {
        // return gmdate("r",$this->unix);
        $date = gmdate("D, d M Y H:i:s", $this->unix);
        if (TIME_ZONE != "") $date .= " " . str_replace(":", "", TIME_ZONE);
        return $date;
    }

    /*
	 * Gets the date stored in this FeedDate as an ISO 8601 date.
	 *
	 * @return a date in ISO 8601 format
	 */
    function iso8601()
    {
        $date = gmdate("Y-m-d\TH:i:sO", $this->unix);
        $date = substr($date, 0, 22) . ':' . substr($date, -2);
        if (TIME_ZONE != "") $date = str_replace("+00:00", TIME_ZONE, $date);
        return $date;
    }

    /*
	 * Gets the date stored in this FeedDate as unix time stamp.
	 *
	 * @return a date as a unix time stamp
	 */
    function unix()
    {
        return $this->unix;
    }
}

/*
 * RSSCreator10 is a FeedCreator that implements RDF Site Summary (RSS) 1.0.
 *
 * @see http://www.purl.org/rss/1.0/
 * @since 1.3
 * @author Kai Blankenhorn <kaib@bitfolge.de>
 */
class RSSCreator10 extends FeedCreator {
    /*
	 * Builds the RSS feed's text. The feed will be compliant to RDF Site Summary (RSS) 1.0.
	 * The feed will contain all items previously added in the same order.
	 * @return    string    the feed's complete text
	 */
    function createFeed()
    {
        $feed = "<?xml version=\"1.0\" encoding=\"" . $this->encoding . "\"?>\n";
        $feed .= $this->_createGeneratorComment();
        if ($this->cssStyleSheet == "") {
            $cssStyleSheet = "http://www.w3.org/2000/08/w3c-synd/style.css";
        }
        $feed .= $this->_createStylesheetReferences();
        $feed .= "<rdf:RDF\n";
        $feed .= "    xmlns=\"http://purl.org/rss/1.0/\"\n";
        $feed .= "    xmlns:rdf=\"http://www.w3.org/1999/02/22-rdf-syntax-ns#\"\n";
        $feed .= "    xmlns:slash=\"http://purl.org/rss/1.0/modules/slash/\"\n";
        $feed .= "    xmlns:dc=\"http://purl.org/dc/elements/1.1/\">\n";
        $feed .= "    <channel rdf:about=\"" . $this->syndicationURL . "\">\n";
        $feed .= "        <title>" . htmlspecialchars($this->title) . "</title>\n";
        $feed .= "        <description>" . htmlspecialchars($this->description) . "</description>\n";
        $feed .= "        <link>" . $this->link . "</link>\n";
        if ($this->image != null) {
            $feed .= "        <image rdf:resource=\"" . $this->image->url . "\" />\n";
        }
        $now = new FeedDate();
        $feed .= "       <dc:date>" . htmlspecialchars($now->iso8601()) . "</dc:date>\n";
        $feed .= "        <items>\n";
        $feed .= "            <rdf:Seq>\n";
        for ($i = 0;$i < count($this->items);$i++) {
            $feed .= "                <rdf:li rdf:resource=\"" . htmlspecialchars($this->items[$i]->link) . "\"/>\n";
        }
        $feed .= "            </rdf:Seq>\n";
        $feed .= "        </items>\n";
        $feed .= "    </channel>\n";
        if ($this->image != null) {
            $feed .= "    <image rdf:about=\"" . $this->image->url . "\">\n";
            $feed .= "        <title>" . $this->image->title . "</title>\n";
            $feed .= "        <link>" . $this->image->link . "</link>\n";
            $feed .= "        <url>" . $this->image->url . "</url>\n";
            $feed .= "    </image>\n";
        }
        $feed .= $this->_createAdditionalElements($this->additionalElements, "    ");

        for ($i = 0;$i < count($this->items);$i++) {
            $feed .= "    <item rdf:about=\"" . htmlspecialchars($this->items[$i]->link) . "\">\n";
            // $feed.= "        <dc:type>Posting</dc:type>\n";
            $feed .= "        <dc:format>text/html</dc:format>\n";
            if ($this->items[$i]->date != null) {
                $itemDate = new FeedDate($this->items[$i]->date);
                $feed .= "        <dc:date>" . htmlspecialchars($itemDate->iso8601()) . "</dc:date>\n";
            }
            if ($this->items[$i]->source != "") {
                $feed .= "        <dc:source>" . htmlspecialchars($this->items[$i]->source) . "</dc:source>\n";
            }
            if ($this->items[$i]->author != "") {
                $feed .= "        <dc:creator>" . htmlspecialchars($this->items[$i]->author) . "</dc:creator>\n";
            }
            $feed .= "        <title>" . htmlspecialchars(strip_tags(strtr($this->items[$i]->title, "\n\r", "  "))) . "</title>\n";
            $feed .= "        <link>" . htmlspecialchars($this->items[$i]->link) . "</link>\n";
            $feed .= "        <description>" . htmlspecialchars($this->items[$i]->description) . "</description>\n";
            $feed .= $this->_createAdditionalElements($this->items[$i]->additionalElements, "        ");
            $feed .= "    </item>\n";
        }
        $feed .= "</rdf:RDF>\n";
        return $feed;
    }
}

/*
 * RSSCreator091 is a FeedCreator that implements RSS 0.91 Spec, revision 3.
 *
 * @see http://my.netscape.com/publish/formats/rss-spec-0.91.html
 * @since 1.3
 * @author Kai Blankenhorn <kaib@bitfolge.de>
 */
class RSSCreator091 extends FeedCreator {
    /*
	 * Stores this RSS feed's version number.
	 * @access private
	 */
    var $RSSVersion;

    function RSSCreator091()
    {
        $this->_setRSSVersion("0.91");
        $this->contentType = "application/rss+xml";
    }

    /*
	 * Sets this RSS feed's version number.
	 * @access private
	 */
    function _setRSSVersion($version)
    {
        $this->RSSVersion = $version;
    }

    /*
	 * Builds the RSS feed's text. The feed will be compliant to RDF Site Summary (RSS) 1.0.
	 * The feed will contain all items previously added in the same order.
	 * @return    string    the feed's complete text
	 */
    function createFeed()
    {
        $feed = "<?xml version=\"1.0\" encoding=\"" . $this->encoding . "\"?>\n";
        $feed .= $this->_createGeneratorComment();
        $feed .= $this->_createStylesheetReferences();
        $feed .= "<rss version=\"" . $this->RSSVersion . "\">\n";
        $feed .= "    <channel>\n";
        $feed .= "        <title>" . FeedCreator::iTrunc(htmlspecialchars($this->title), 100) . "</title>\n";
        $this->descriptionTruncSize = 500;
        $feed .= "        <description>" . $this->getDescription() . "</description>\n";
        $feed .= "        <link>" . $this->link . "</link>\n";
        $now = new FeedDate();
        $feed .= "        <lastBuildDate>" . htmlspecialchars($now->rfc822()) . "</lastBuildDate>\n";
        $feed .= "        <generator>" . FEEDCREATOR_VERSION . "</generator>\n";

        if ($this->image != null) {
            $feed .= "        <image>\n";
            $feed .= "            <url>" . $this->image->url . "</url>\n";
            $feed .= "            <title>" . FeedCreator::iTrunc(htmlspecialchars($this->image->title), 100) . "</title>\n";
            $feed .= "            <link>" . $this->image->link . "</link>\n";
            if ($this->image->width != "") {
                $feed .= "            <width>" . $this->image->width . "</width>\n";
            }
            if ($this->image->height != "") {
                $feed .= "            <height>" . $this->image->height . "</height>\n";
            }
            if ($this->image->description != "") {
                $feed .= "            <description>" . $this->image->getDescription() . "</description>\n";
            }
            $feed .= "        </image>\n";
        }
        if ($this->language != "") {
            $feed .= "        <language>" . $this->language . "</language>\n";
        }
        if ($this->copyright != "") {
            $feed .= "        <copyright>" . FeedCreator::iTrunc(htmlspecialchars($this->copyright), 100) . "</copyright>\n";
        }
        if ($this->editor != "") {
            $feed .= "        <managingEditor>" . FeedCreator::iTrunc(htmlspecialchars($this->editor), 100) . "</managingEditor>\n";
        }
        if ($this->webmaster != "") {
            $feed .= "        <webMaster>" . FeedCreator::iTrunc(htmlspecialchars($this->webmaster), 100) . "</webMaster>\n";
        }
        if ($this->pubDate != "") {
            $pubDate = new FeedDate($this->pubDate);
            $feed .= "        <pubDate>" . htmlspecialchars($pubDate->rfc822()) . "</pubDate>\n";
        }
        if ($this->category != "") {
            $feed .= "        <category>" . htmlspecialchars($this->category) . "</category>\n";
        }
        if ($this->docs != "") {
            $feed .= "        <docs>" . FeedCreator::iTrunc(htmlspecialchars($this->docs), 500) . "</docs>\n";
        }
        if ($this->ttl != "") {
            $feed .= "        <ttl>" . htmlspecialchars($this->ttl) . "</ttl>\n";
        }
        if ($this->rating != "") {
            $feed .= "        <rating>" . FeedCreator::iTrunc(htmlspecialchars($this->rating), 500) . "</rating>\n";
        }
        if ($this->skipHours != "") {
            $feed .= "        <skipHours>" . htmlspecialchars($this->skipHours) . "</skipHours>\n";
        }
        if ($this->skipDays != "") {
            $feed .= "        <skipDays>" . htmlspecialchars($this->skipDays) . "</skipDays>\n";
        }
        $feed .= $this->_createAdditionalElements($this->additionalElements, "    ");

        for ($i = 0;$i < count($this->items);$i++) {
            $feed .= "        <item>\n";
            $feed .= "            <title>" . FeedCreator::iTrunc(htmlspecialchars(strip_tags($this->items[$i]->title)), 100) . "</title>\n";
            $feed .= "            <link>" . htmlspecialchars($this->items[$i]->link) . "</link>\n";
            $feed .= "            <description>" . $this->items[$i]->getDescription() . "</description>\n";

            if ($this->items[$i]->author != "") {
                $feed .= "            <author>" . htmlspecialchars($this->items[$i]->author) . "</author>\n";
            }
            /*
			// on hold
			if ($this->items[$i]->source!="") {
					$feed.= "            <source>".htmlspecialchars($this->items[$i]->source)."</source>\n";
			}
			*/
            if ($this->items[$i]->category != "") {
                $feed .= "            <category>" . htmlspecialchars($this->items[$i]->category) . "</category>\n";
            }
            if ($this->items[$i]->comments != "") {
                $feed .= "            <comments>" . htmlspecialchars($this->items[$i]->comments) . "</comments>\n";
            }
            if ($this->items[$i]->date != "") {
                $itemDate = new FeedDate($this->items[$i]->date);
                $feed .= "            <pubDate>" . htmlspecialchars($itemDate->rfc822()) . "</pubDate>\n";
            }
            if ($this->items[$i]->guid != "") {
                $feed .= "            <guid>" . htmlspecialchars($this->items[$i]->guid) . "</guid>\n";
            }
            $feed .= $this->_createAdditionalElements($this->items[$i]->additionalElements, "        ");
            $feed .= "        </item>\n";
        }
        $feed .= "    </channel>\n";
        $feed .= "</rss>\n";
        return $feed;
    }
}

/*
 * RSSCreator20 is a FeedCreator that implements RDF Site Summary (RSS) 2.0.
 *
 * @see http://backend.userland.com/rss
 * @since 1.3
 * @author Kai Blankenhorn <kaib@bitfolge.de>
 */
class RSSCreator20 extends RSSCreator091 {
    function RSSCreator20()
    {
        parent::_setRSSVersion("2.0");
    }
}

/*
 * PIECreator01 is a FeedCreator that implements the emerging PIE specification,
 * as in http://intertwingly.net/wiki/pie/Syntax.
 *
 * @deprecated
 * @since 1.3
 * @author Scott Reynen <scott@randomchaos.com> and Kai Blankenhorn <kaib@bitfolge.de>
 */
class PIECreator01 extends FeedCreator {
    function PIECreator01()
    {
        $this->encoding = "utf-8";
    }

    function createFeed()
    {
        $feed = "<?xml version=\"1.0\" encoding=\"" . $this->encoding . "\"?>\n";
        $feed .= $this->_createStylesheetReferences();
        $feed .= "<feed version=\"0.1\" xmlns=\"http://example.com/newformat#\">\n";
        $feed .= "    <title>" . FeedCreator::iTrunc(htmlspecialchars($this->title), 100) . "</title>\n";
        $this->truncSize = 500;
        $feed .= "    <subtitle>" . $this->getDescription() . "</subtitle>\n";
        $feed .= "    <link>" . $this->link . "</link>\n";
        for ($i = 0;$i < count($this->items);$i++) {
            $feed .= "    <entry>\n";
            $feed .= "        <title>" . FeedCreator::iTrunc(htmlspecialchars(strip_tags($this->items[$i]->title)), 100) . "</title>\n";
            $feed .= "        <link>" . htmlspecialchars($this->items[$i]->link) . "</link>\n";
            $itemDate = new FeedDate($this->items[$i]->date);
            $feed .= "        <created>" . htmlspecialchars($itemDate->iso8601()) . "</created>\n";
            $feed .= "        <issued>" . htmlspecialchars($itemDate->iso8601()) . "</issued>\n";
            $feed .= "        <modified>" . htmlspecialchars($itemDate->iso8601()) . "</modified>\n";
            $feed .= "        <id>" . htmlspecialchars($this->items[$i]->guid) . "</id>\n";
            if ($this->items[$i]->author != "") {
                $feed .= "        <author>\n";
                $feed .= "            <name>" . htmlspecialchars($this->items[$i]->author) . "</name>\n";
                if ($this->items[$i]->authorEmail != "") {
                    $feed .= "            <email>" . $this->items[$i]->authorEmail . "</email>\n";
                }
                $feed .= "        </author>\n";
            }
            $feed .= "        <content type=\"text/html\" xml:lang=\"en-us\">\n";
            $feed .= "            <div xmlns=\"http://www.w3.org/1999/xhtml\">" . $this->items[$i]->getDescription() . "</div>\n";
            $feed .= "        </content>\n";
            $feed .= "    </entry>\n";
        }
        $feed .= "</feed>\n";
        return $feed;
    }
}

/*
 * AtomCreator03 is a FeedCreator that implements the atom specification,
 * as in http://www.intertwingly.net/wiki/pie/FrontPage.
 * Please note that just by using AtomCreator03 you won't automatically
 * produce valid atom files. For example, you have to specify either an editor
 * for the feed or an author for every single feed item.
 *
 * Some elements have not been implemented yet. These are (incomplete list):
 * author URL, item author's email and URL, item contents, alternate links,
 * other link content types than text/html. Some of them may be created with
 * AtomCreator03::additionalElements.
 *
 * @see FeedCreator#additionalElements
 * @since 1.6
 * @author Kai Blankenhorn <kaib@bitfolge.de>, Scott Reynen <scott@randomchaos.com>
 */
class AtomCreator03 extends FeedCreator {
    function AtomCreator03()
    {
        $this->contentType = "application/atom+xml";
        $this->encoding = "utf-8";
    }

    function createFeed()
    {
        $feed = "<?xml version=\"1.0\" encoding=\"" . $this->encoding . "\"?>\n";
        $feed .= $this->_createGeneratorComment();
        $feed .= $this->_createStylesheetReferences();
        $feed .= "<feed version=\"0.3\" xmlns=\"http://purl.org/atom/ns#\"";
        if ($this->language != "") {
            $feed .= " xml:lang=\"" . $this->language . "\"";
        }
        $feed .= ">\n";
        $feed .= "    <title>" . htmlspecialchars($this->title) . "</title>\n";
        $feed .= "    <tagline>" . htmlspecialchars($this->description) . "</tagline>\n";
        $feed .= "    <link rel=\"alternate\" type=\"text/html\" href=\"" . htmlspecialchars($this->link) . "\"/>\n";
        $feed .= "    <id>" . htmlspecialchars($this->link) . "</id>\n";
        $now = new FeedDate();
        $feed .= "    <modified>" . htmlspecialchars($now->iso8601()) . "</modified>\n";
        if ($this->editor != "") {
            $feed .= "    <author>\n";
            $feed .= "        <name>" . $this->editor . "</name>\n";
            if ($this->editorEmail != "") {
                $feed .= "        <email>" . $this->editorEmail . "</email>\n";
            }
            $feed .= "    </author>\n";
        }
        $feed .= "    <generator>" . FEEDCREATOR_VERSION . "</generator>\n";
        $feed .= $this->_createAdditionalElements($this->additionalElements, "    ");
        for ($i = 0;$i < count($this->items);$i++) {
            $feed .= "    <entry>\n";
            $feed .= "        <title>" . htmlspecialchars(strip_tags($this->items[$i]->title)) . "</title>\n";
            $feed .= "        <link rel=\"alternate\" type=\"text/html\" href=\"" . htmlspecialchars($this->items[$i]->link) . "\"/>\n";
            if ($this->items[$i]->date == "") {
                $this->items[$i]->date = time();
            }
            $itemDate = new FeedDate($this->items[$i]->date);
            $feed .= "        <created>" . htmlspecialchars($itemDate->iso8601()) . "</created>\n";
            $feed .= "        <issued>" . htmlspecialchars($itemDate->iso8601()) . "</issued>\n";
            $feed .= "        <modified>" . htmlspecialchars($itemDate->iso8601()) . "</modified>\n";
            $feed .= "        <id>" . htmlspecialchars($this->items[$i]->link) . "</id>\n";
            $feed .= $this->_createAdditionalElements($this->items[$i]->additionalElements, "        ");
            if ($this->items[$i]->author != "") {
                $feed .= "        <author>\n";
                $feed .= "            <name>" . htmlspecialchars($this->items[$i]->author) . "</name>\n";
                $feed .= "        </author>\n";
            }
            if ($this->items[$i]->description != "") {
                $feed .= "        <summary>" . htmlspecialchars($this->items[$i]->description) . "</summary>\n";
            }
            $feed .= "    </entry>\n";
        }
        $feed .= "</feed>\n";
        return $feed;
    }
}

/*
 * MBOXCreator is a FeedCreator that implements the mbox format
 * as described in http://www.qmail.org/man/man5/mbox.html
 *
 * @since 1.3
 * @author Kai Blankenhorn <kaib@bitfolge.de>
 */
class MBOXCreator extends FeedCreator {
    function MBOXCreator()
    {
        $this->contentType = "text/plain";
        $this->encoding = "ISO-8859-15";
    }

    function qp_enc($input = "", $line_max = 76)
    {
        $hex = array('0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F');
        $lines = preg_split("/(?:\r\n|\r|\n)/", $input);
        $eol = "\r\n";
        $escape = "=";
        $output = "";
        while (list(, $line) = each($lines)) {
            // $line = rtrim($line); // remove trailing white space -> no =20\r\n necessary
            $linlen = strlen($line);
            $newline = "";
            for($i = 0; $i < $linlen; $i++) {
                $c = substr($line, $i, 1);
                $dec = ord($c);
                if (($dec == 32) && ($i == ($linlen - 1))) { // convert space at eol only
                    $c = "=20";
                } elseif (($dec == 61) || ($dec < 32) || ($dec > 126)) { // always encode "\t", which is *not* required
                    $h2 = floor($dec / 16);
                    $h1 = floor($dec % 16);
                    $c = $escape . $hex["$h2"] . $hex["$h1"];
                }
                if ((strlen($newline) + strlen($c)) >= $line_max) { // CRLF is not counted
                    $output .= $newline . $escape . $eol; // soft line break; " =\r\n" is okay
                    $newline = "";
                }
                $newline .= $c;
            } // end of for
            $output .= $newline . $eol;
        }
        return trim($output);
    }

    /*
	 * Builds the MBOX contents.
	 * @return    string    the feed's complete text
	 */
    function createFeed()
    {
        for ($i = 0;$i < count($this->items);$i++) {
            if ($this->items[$i]->author != "") {
                $from = $this->items[$i]->author;
            } else {
                $from = $this->title;
            }
            $itemDate = new FeedDate($this->items[$i]->date);
            $feed .= "From " . strtr(MBOXCreator::qp_enc($from), " ", "_") . " " . date("D M d H:i:s Y", $itemDate->unix()) . "\n";
            $feed .= "Content-Type: text/plain;\n";
            $feed .= "	charset=\"" . $this->encoding . "\"\n";
            $feed .= "Content-Transfer-Encoding: quoted-printable\n";
            $feed .= "Content-Type: text/plain\n";
            $feed .= "From: \"" . MBOXCreator::qp_enc($from) . "\"\n";
            $feed .= "Date: " . $itemDate->rfc822() . "\n";
            $feed .= "Subject: " . MBOXCreator::qp_enc(FeedCreator::iTrunc($this->items[$i]->title, 100)) . "\n";
            $feed .= "\n";
            $body = chunk_split(MBOXCreator::qp_enc($this->items[$i]->description));
            $feed .= preg_replace("~\nFrom ([^\n]*)(\n?)~", "\n>From $1$2\n", $body);
            $feed .= "\n";
            $feed .= "\n";
        }
        return $feed;
    }

    /*
	 * Generate a filename for the feed cache file. Overridden from FeedCreator to prevent XML data types.
	 * @return string the feed cache filename
	 * @since 1.4
	 * @access private
	 */
    function _generateFilename()
    {
        $fileInfo = pathinfo($_SERVER["PHP_SELF"]);
        return substr($fileInfo["basename"], 0, - (strlen($fileInfo["extension"]) + 1)) . ".mbox";
    }
}

/*
 * OPMLCreator is a FeedCreator that implements OPML 1.0.
 *
 * @see http://opml.scripting.com/spec
 * @author Dirk Clemens, Kai Blankenhorn
 * @since 1.5
 */
class OPMLCreator extends FeedCreator {
    function OPMLCreator()
    {
        $this->encoding = "utf-8";
    }

    function createFeed()
    {
        $feed = "<?xml version=\"1.0\" encoding=\"" . $this->encoding . "\"?>\n";
        $feed .= $this->_createGeneratorComment();
        $feed .= $this->_createStylesheetReferences();
        $feed .= "<opml xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\" xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\">\n";
        $feed .= "    <head>\n";
        $feed .= "        <title>" . htmlspecialchars($this->title) . "</title>\n";
        if ($this->pubDate != "") {
            $date = new FeedDate($this->pubDate);
            $feed .= "         <dateCreated>" . $date->rfc822() . "</dateCreated>\n";
        }
        if ($this->lastBuildDate != "") {
            $date = new FeedDate($this->lastBuildDate);
            $feed .= "         <dateModified>" . $date->rfc822() . "</dateModified>\n";
        }
        if ($this->editor != "") {
            $feed .= "         <ownerName>" . $this->editor . "</ownerName>\n";
        }
        if ($this->editorEmail != "") {
            $feed .= "         <ownerEmail>" . $this->editorEmail . "</ownerEmail>\n";
        }
        $feed .= "    </head>\n";
        $feed .= "    <body>\n";
        for ($i = 0;$i < count($this->items);$i++) {
            $feed .= "    <outline type=\"rss\" ";
            $title = htmlspecialchars(strip_tags(strtr($this->items[$i]->title, "\n\r", "  ")));
            $feed .= " title=\"" . $title . "\"";
            $feed .= " text=\"" . $title . "\"";
            // $feed.= " description=\"".htmlspecialchars($this->items[$i]->description)."\"";
            $feed .= " url=\"" . htmlspecialchars($this->items[$i]->link) . "\"";
            $feed .= "/>\n";
        }
        $feed .= "    </body>\n";
        $feed .= "</opml>\n";
        return $feed;
    }
}

/*
 * HTMLCreator is a FeedCreator that writes an HTML feed file to a specific
 * location, overriding the createFeed method of the parent FeedCreator.
 * The HTML produced can be included over http by scripting languages, or serve
 * as the source for an IFrame.
 * All output by this class is embedded in <div></div> tags to enable formatting
 * using CSS.
 *
 * @author Pascal Van Hecke
 * @since 1.7
 */
class HTMLCreator extends FeedCreator {
    var $contentType = "text/html";

    /*
	 * Contains HTML to be output at the start of the feed's html representation.
	 */
    var $header;

    /*
	 * Contains HTML to be output at the end of the feed's html representation.
	 */
    var $footer ;

    /*
	 * Contains HTML to be output between entries. A separator is only used in
	 * case of multiple entries.
	 */
    var $separator;

    /*
	 * Used to prefix the stylenames to make sure they are unique
	 * and do not clash with stylenames on the users' page.
	 */
    var $stylePrefix;

    /*
	 * Determines whether the links open in a new window or not.
	 */
    var $openInNewWindow = true;

    var $imageAlign = "right";

    /*
	 * In case of very simple output you may want to get rid of the style tags,
	 * hence this variable.  There's no equivalent on item level, but of course you can
	 * add strings to it while iterating over the items ($this->stylelessOutput .= ...)
	 * and when it is non-empty, ONLY the styleless output is printed, the rest is ignored
	 * in the function createFeed().
	 */
    var $stylelessOutput = "";

    /*
	 * Writes the HTML.
	 * @return    string    the scripts's complete text
	 */
    function createFeed()
    {
        // if there is styleless output, use the content of this variable and ignore the rest
        if ($this->stylelessOutput != "") {
            return $this->stylelessOutput;
        }
        // if no stylePrefix is set, generate it yourself depending on the script name
        if ($this->stylePrefix == "") {
            $this->stylePrefix = str_replace(".", "_", $this->_generateFilename()) . "_";
        }
        // set an openInNewWindow_token_to be inserted or not
        if ($this->openInNewWindow) {
            $targetInsert = " target='_blank'";
        }
        // use this array to put the lines in and implode later with "document.write" javascript
        $feedArray = array();
        if ($this->image != null) {
            $imageStr = "<a href='" . $this->image->link . "'" . $targetInsert . ">" . "<img src='" . $this->image->url . "' border='0' alt='" .
            FeedCreator::iTrunc(htmlspecialchars($this->image->title), 100) . "' align='" . $this->imageAlign . "' ";
            if ($this->image->width) {
                $imageStr .= " width='" . $this->image->width . "' ";
            }
            if ($this->image->height) {
                $imageStr .= " height='" . $this->image->height . "' ";
            }
            $imageStr .= "/></a>";
            $feedArray[] = $imageStr;
        }

        if ($this->title) {
            $feedArray[] = "<div class='" . $this->stylePrefix . "title'><a href='" . $this->link . "' " . $targetInsert . " class='" . $this->stylePrefix . "title'>" .
            FeedCreator::iTrunc(htmlspecialchars($this->title), 100) . "</a></div>";
        }
        if ($this->getDescription()) {
            $feedArray[] = "<div class='" . $this->stylePrefix . "description'>" .
            str_replace("]]>", "", str_replace("<![CDATA[", "", $this->getDescription())) . "</div>";
        }

        if ($this->header) {
            $feedArray[] = "<div class='" . $this->stylePrefix . "header'>" . $this->header . "</div>";
        }

        for ($i = 0;$i < count($this->items);$i++) {
            if ($this->separator and $i > 0) {
                $feedArray[] = "<div class='" . $this->stylePrefix . "separator'>" . $this->separator . "</div>";
            }

            if ($this->items[$i]->title) {
                if ($this->items[$i]->link) {
                    $feedArray[] = "<div class='" . $this->stylePrefix . "item_title'><a href='" . $this->items[$i]->link . "' class='" . $this->stylePrefix . "item_title'" . $targetInsert . ">" . FeedCreator::iTrunc(htmlspecialchars(strip_tags($this->items[$i]->title)), 100) . "</a></div>";
                } else {
                    $feedArray[] = "<div class='" . $this->stylePrefix . "item_title'>" .
                    FeedCreator::iTrunc(htmlspecialchars(strip_tags($this->items[$i]->title)), 100) . "</div>";
                }
            }
            if ($this->items[$i]->getDescription()) {
                $feedArray[] = "<div class='" . $this->stylePrefix . "item_description'>" .
                str_replace("]]>", "", str_replace("<![CDATA[", "", $this->items[$i]->getDescription())) . "</div>";
            }
        }
        if ($this->footer) {
            $feedArray[] = "<div class='" . $this->stylePrefix . "footer'>" . $this->footer . "</div>";
        }

        $feed = "" . join($feedArray, "\r\n");
        return $feed;
    }

    /*
	 * Overrrides parent to produce .html extensions
	 *
	 * @return string the feed cache filename
	 * @since 1.4
	 * @access private
	 */
    function _generateFilename()
    {
        $fileInfo = pathinfo($_SERVER["PHP_SELF"]);
        return substr($fileInfo["basename"], 0, - (strlen($fileInfo["extension"]) + 1)) . ".html";
    }
}

/*
 * JSCreator is a class that writes a js file to a specific
 * location, overriding the createFeed method of the parent HTMLCreator.
 *
 * @author Pascal Van Hecke
 */
class JSCreator extends HTMLCreator {
    var $contentType = "text/javascript";

    /*
	 * writes the javascript
	 * @return    string    the scripts's complete text
	 */
    function createFeed()
    {
        $feed = parent::createFeed();
        $feedArray = explode("\n", $feed);

        $jsFeed = "";
        foreach ($feedArray as $value) {
            $jsFeed .= "document.write('" . trim(addslashes($value)) . "');\n";
        }
        return $jsFeed;
    }

    /*
	 * Overrrides parent to produce .js extensions
	 *
	 * @return string the feed cache filename
	 * @since 1.4
	 * @access private
	 */
    function _generateFilename()
    {
        $fileInfo = pathinfo($_SERVER["PHP_SELF"]);
        return substr($fileInfo["basename"], 0, - (strlen($fileInfo["extension"]) + 1)) . ".js";
    }
}

?>
